I saw somebody at NAMM a couple years ago was showing an aluminum drop in replacement for the standard hole pattern vintage Fender tuner. Can't remember for sure who it was but I think it might have been Gotoh.

OK, did a little more research. They are from Gotoh and they are called Res-O-Lite. Allparts has the the large plate reverse version which is not what you need but you might call them and see if they can get the standard vintage style that you need. Sounds like these are fairly unavailable from what I see on the interwebs but worth a try.

@Wymore Guitars: Thanks, I knew about these earlier. See my first post in the thread.

@steveonbass: I've contacted Hipshot. It looks like HB2 are ~22g lighter (each) than Schaller BMFL. It gives a loss of about 88g (~3.1oz) for the whole set. Not bad. But it's not worth the swap. I'll continue my search...